Bobbin stripper for automatic looms



I, T. MALLUY.`

BUGBIN STRHPER FUR AUTOMATIC LUOMS.

Avvucnrfon FMD ma. 15 1920.

1,423,670. Patented July 25, 1999 y 2 SHEES--SHEE 2.

' m'oval may be done by hand or by )y bringing UNITED STATES PATENT OFFICE.

JAMES T. MALLOY. 0F LOWELL. MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS. OF ONE-HALF T0 JOHN J. HENDERSON, OF DRACUT, MASSACHU- SETTS, AND ONE-HALF TQ SAMUEL R. HAINES. OF BROUKLINE, MASSACHUSETTS.

BOBBIN STRIPPER FOR AUTOMATIC LOOMS.

Specication at Letters Patent.

Patented July 25, 1922.

Application tiled narch'l, 1920. Serial No. 385,516.

To all whom it 'may concern.'

Be it known that l. JAMES T. MALmY, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Bobbin Strippers for Automatic Loomsq of which the following is a specification.

This invention relates to what are known as automatic or weft replenishing looms. ln order that mispicks may be avoided in weaving, practically every bobbin or weft carrier which is used is discharged from the shuttle or from the magazine with more or less yarn thereon.

In some automatic weft replenishing looms, the shuttles are automatically discharged when the weft is almost exhausted, but in the much more common type, and the type to which my invention is especially app icable, when one bobbn in a shuttle is almost exhausted of weft or filling, it is discharged and another one is replaced in the shuttle. While my invention might be usedon shuttle replacing looms. it is more articularly adapted for those in which the ljaobbins are re laced.

efore the bobbins on which yarn is wound can be used again, the remaining yarn must be removed therefrom. Such rea separate machine. 0r it may be removed the loose end in contact with a stripper, suc as a revolving spindle or revolving bobbin, which catches such loose end of the yarn and unwihds it from the bobbin while the bobbin is dropping into the can and after it is in the can.

lVith the last described devices` if loose end of yarn does not engage the stripper, that particular bobbin is not strip ed, and if another afterwards descends an its end is caught, it drops into the can and its yarn, as it is being wound up on the stripper fre uently engages the end on an unwoun bob in with thc result that two or more bobbins become entangled and are lifted to the stripper, causing jams and serious injuries.

Particularl where the bobbins are replenished andA the almost empty bobbin is forced out by a full bobbin, there is a tendency, if the shuttle springs are not of exactlv the same strength. for the discharged bobhin to start spinning in a direction which winds up the yarn as it goes down` and this tendency is accentuated when it strikes the apron usually provided on such looms.

' ln practically' all such automatic looms, the weft carrier is changed when the lay beam is in contact with or at its nearest point oi approach to. the breast beam. while the shuttle starts to traverse when the lay beam is about halfway back to its farthest point from the breast eam.

The yarn on the old bobbin is cut near the cloth leaving a loose end from which the shuttle..\vith the new bdbbin, is supposed to clear itself ou the first ick. Frequently however. it carries the olf loose end with it inttl; the cloth making side lines and double pic s.

The purpose of this invention is to provide a trap which will positively and invariably catch the loose end of yarn between the point where it is cut at the edge of the cloth and the bobbin, and hold it until the shuttle clears itself of the old loose end and until the bobbin or other weft carrier begins to unwind as it descends. Preferably l provide means to assist the bobbin to unwind and I so arrange my trap that it will positively catch and hold the loose end of yarn during certain periods but will release it at other periods to permit the end to clear itself or be cleared from the trap and otlier parts.

The weft carrier may be unwound or stripped by gravit alone or may 'be assisted by various (evices.

ln the drawings. Fig. 1 is a f-ront elevation of part of the breast beam and lay beam of a magazine loom` with my preferred form of device in position, parts being broken away to show the construction.

Fig. 2 is a sectional elevation looking from the right on line 2--2 of Fig l.

Fig 3 is a side elevation of the parts of a magazine lotlmr includin the lay beam, shown in sect ion., picker stick and the dagger.

'Fig 4 is vdiagram in 'elevation showing threelooms on one door, and the connections with a Hoor below.

' Fig 5 is a sectional side elevation similar to Fig. 2 showing another form of trap.

Fig is a. front elevation showing my trap, together with a revoluble spindle and can, together with certain parts of the loom1 to illustrate the operation.

5 Fig. 7 is a side elevation showing parts of a narrow fabric loom, in a position similar to Fig Fig 8 is a. horizontal seetion ot' a lay beam with a modified forni of trap, one position being shown in full lines and another position in dotted lines.

In the drawings, A represents tihe breast beam7 L the lay. l() part ot' the traine.y C the picker, and l2, l2 the magazine of a maga initie` loom of the Crompton and., Knowles type. 9 represents a full bobbin in the maga zine, and B a bobbin which has been almost exhausted ol the yarn t3 and has been discharged from the shuttle. such as D, having an eye 19.

21 1and 22 represent the opposite walls of the passage L1 in the lay beam L through which the empty or almost empty bobbin is discharged from a shuttle and Z is the loose end of yarn.

I prefer to loeate my trap T in this passage, as shown in Figs. 52 and Il, as it is clesirable to catrh the end of the yarn lil as soon as possible after the bobbin has been discharged.

My trap T comprises a spindle il() carried in bearings 23 and 24 shown as attached to the outside ot the lay beam on the side 2*), The arms 3l and 3E! extend at right angles to spindle 30 preferably so curving that` the eross bar 33 will rest snngly up against the top part of side 22 when the trap is closed. This forms a trap bobbin passage 39.

The returning spring :l attarhed at one end to spindle 3U and at the other end to hearing QCiVand is so positioned that it tends to fold up the trap against the side 22 when not pushed open by the dagger Ilo. This dagger 36 is connected at 3T to any stationary part ot' the frame l() and passes through a suitable hole 27 in the side 2L. The dagA ger and hole are so positioned that the |lagger will strike a bumper plate -l on arin Ill when the lay beam has almost come up to its -nearest point to the breast beam und inune diatel)1 before the empty hobhin is discharged. The dagger :itl may bc rigid. or may be a metal rod whirh can readily he bent so as to adjust the parts correctly.

Preferably. the dagger strikes at a point. on the bumper plaie pretty well down towards the spindle 4:4o that the cross bar 2li-l will more rapidly over to the dotted line position as shown in Fig. Il. l find that from threefilluirters to one inch from the tinul sta tionary position of thii lay beam is desirable on many looms.

Asasliown in ["ig, :2. my trap is'opi-n inst before the hobbin is discharged, but is 65 closed by tle spring 35, as the lay lieani recelles. in time to catch and bold the loose end of the varn before it is Carried past by the i iscending hobbin.

As soon as the end is caught. the bobhin, being still in flight. will be spun around. unwinding. andif it has sufficient space in which to drop. all the yarn will be unwonurl. instead of thc can generally used with such loornsdmay use a chute, such as 45, into which the bohbin I drops. continuidg down to the f'lool' below or to several floors below,y unwinding as it goes nntil all the yarn is unwound. 0n the next` piek. the trap is again open and the weight of the yarn will clear il, from the trap while that is open. The chute may be regarded means to assist the bobbin to unwind,

I may arrange a plurality of looms. such as 40, 4 1, 4&2. standing on floor 4?), with chutes l5. 46 and 4T which enter a common chute 48 which terminates in a box t9 resting on the floor below 44. The bohbins will drop through these chutes into box 4l), l may also provide a suction pipe 5() connected with ablower l whereby power lul rurrents ot' air will run down through rhntes 4in 46 and 4T. which will piek up the nnwound yarn and carry it` through to the blower or into a suitable receptacle. The empty bobbins. meanwhile will remain in the box 49.

In such a case. the chutes, box and blower may all he regarded as means to assist the bohbins to unwind.

ln Fig. i show a n'ioditiration ol my trap. in which the spindle (il is hung at the 100 baclt of side 2i oi' the lay beam on hangers (Sli and has a depending tail (lil in position to he engaged by dagger G4. The arms 62 extend np and in. and` they, with the Cross ha: (in. are normally held np close to the side 105 'L21 by n suitable spriiig; not shown. The dagger G4 will open up the trap from the bath instead ol' l'loni the front.

ln Fig. (3. as a means to assist the bobbin to unwind. l show a revolving spindle 15 car- 110 ried in suitable bearings llon frame 1th raruviug whirl lli revoluble by a bell 1T. This ,spindle similar to that shown in reissued patent to Moore. o, llll, lay ill` llllll. and is so positioned that. as the L15 hobbiu ll falls. the yarn i3 will voine in contact with the revolving spindle and will bc wound up thereon.

llnder rcrtain conditions it is not necessary to have any means to assist thebobbin 120 to unwind. For instance. l show in Fig, 'i'

a narrow fabric loom with a breast beam and lay beam 7l to which is attarhed a small train on the saine prinriple as athe one shown in Fig. Lindicatedbyi'2. lnsluhlooins 125 there is left on each quill. such Til. so short a piece ot yarn T4 that by the time the quill has reached the bottom of u can. suc-h as T5. the yarn has entirely unwonnd lioln the bobbin or quill. Such looms may weave 130 Mesero fabric less tha-n one inch wide, in which case quills are used, or somewhat wlder, up to twelve or eighteen inches, where bobbins are used, but bobbins and quills are the equivalent so far as this device is concerned.

The yarn catcher bar 33 of my tra T is so near the top of the lay beam bobbin passage 11 and my trap is so timed that the loose end 20 is caught ras soon as the bobbin has passed through the bobbin passage 39 and before there is much acceleration of its descending speed by gravit-y.

llVhile I prefer the type of trap previously described. wherein there is a catcher bar which catches the yarn close up to the shuttle and wherein there is a bobbin passage 39 between the spindle 3U. side arms and catcher bar 33. which is entirely closed in. it is apparent that other types of traps may be used. I find it most convenient to utilize the motion of the lay beam to operate the trap. and to have a dagger or its equivalent so positioned that a slight movement of the lay beam will open the trap widely, and a similar backward movement will close it rapidly. lt is important that instead of uncertain means for retarding the loose end, positive trap mechanism should be used which will invariably seize the end.

ln Fig. 8. I show a modified form of trap M. which is pivoted at 50 to a bracket 9 and extends into the lay beam bobbin passage 1l through a hole 5G. It has a short arm 51 on the outside, a rigid main arm 52. and a stiff forearm 53 at a right angle thereto. lu extension 'of forearm-"57i is the elastic hand :'14 formed of spring metal. leather. or other .suitable material. so positioned that. as shown by the full lines. it will normally hug closely the inner side ol' the trout wall 22 of the lay beam. spring 5T which engages .short arm 51 holds it normally in this position. so that when an end 13 is caught. it will be lirmly held in place. Forearm .33 and hand 54. when the trap M is pushed back by dagger liti. may rest snugly in the groove 5H in the hack wall 51. The trap bobbin passage is formed between the arms .T2 and :'l and hand 54. As shown in Fig. l. the yarn lil running out from the shuttle eye lf naturally passes down through the end ol` passage ll where hand :il is located. 'l`he loose end \\'ill thus invariably he caught therehil as thiI lay beam romrles jfrom the dotti-(l line position to the full line position;

i claimt l. The combination u'ith a wett replenishing loom haring :l frauu'. breast beam. :uol :l l-.rv lwulu with :l bobbin passage. of :l trap comprising side liars pivoted lo the la\ Iwan und :i cro. lull' connecting them. loin ing lioldiin passage between. Siu-ll cross hal' :nul par! of ilu` side liars living haute-l in the lay beam bobbin passage, a s rin adapted to keep the trap normally c ose Vand a dagger attached to the frame in such position that it will Vso engage the trap as to open it duringpart of the period of the lay beams movement to and from the breast beam.

2. Thel combination with a weft replenishing loom having a lay beam with a bobbin passage, of a trap having a bobbin passage located in the lay beam bobbin passage, a trap closing spring, and trap opening means adapted to open the trap While a bobbin is passing through the bobbin passage.

3. The combination with a weft replenishing loom having a lay beam with a bobbin passage. of a trap having a bobbin passage located in the lay beam bobbin passage, and means to so operate the trap as to open and close it for diHerent periods.

4. The combination with a weft replenishing loom, of means adapted to assist the bobbin to unwind after it is discharged from the shuttle. and a trap located in position to catch the loose end of the yarn and to hold it until the bobbin begins to unwind and to release its hold on the yarn at each beat-up of the lay beam.

5. The combination with a weft replenishing loom having a lay beam with a bobbin passage. of a trap havin a bobbin passage located in the lay beam obbin passage, a trap closing spring. and trap opening means operative by the swing of the lay beam adapted to open the trap while a bobbin is passing through the bobbin passage.

(i. The combination with a weft replenishing loom having a lay beam with a bobbin passage. of a trap havin a bobbin passage located in the lay beam bobbin passage, a trap closing spring. and a dagger so attached to the breast beam as to engage and open the trap while a bobbin is passing through the bobbin passage.

T. The combination with a weft replenishing loom having a lay beam with a bobbin passage. of a trap having a bobbin passage located in the lay beam bobbin passage. trap closing means. and trap opening means operative from the lay beam adapted to open the trap at each swing thereof.

8. The combination with a weft replenishiug loom having a lay beam with a bobbin passage. of a trap having a bobbin passage located in the lay beam bobbin passage. und means to .so operate the trap as t0 Open and close il' at each .swing of the lay beam. together with means to assist the bobbin to unuiml after it is discharged from the shuttle.

ln testimony whereoil l have allixed my signature.

JWICS 'l` MALLOY. 

